How to change the CVT transmission fluid?

Tiny
BHAMDOC1973
  • MEMBER
  • 2014 SUBARU OUTBACK
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 155,000 MILES
And if you know what temperature to wait until before opening the fill plug again while its running.
Monday, May 29th, 2023 AT 4:31 PM

1 Reply

Tiny
BRENDON S
  • MECHANIC
  • 653 POSTS
Hello again, BHAMDOC1973,

You will need to have a scan tool capable of measuring the transmission temperature. Once it reaches between 95-113 degrees Fahrenheit, you will have to shift through the gears and then adjust the fluid level to the bottom of the fill hole.

Some tools that you will need:
8mm Hex bit socket (drain plug)
10mm Hex bit socket (fill plug)
Hand pump

I will add images of these items for you as well as instructions on how to change and adjust the fluid.

Here is a link to a hand pump I found from Performance Tool. I use a lot of their products and they are pretty reliable and cost effective however pushing on one of these pumps too hard will break it.

Here is one on Amazon:

https://www.amazon.com/Performance-Tool-W1139-Gallon-Design/dp/B00329VL3G?th=1

The images of the Hex sockets I have added are from Husky which can be found right at Home Depot or on their site.

I would recommend getting the fluid directly from the dealer as well as a new fill plug gasket.

Also putting a couple pieces of 2x6 lumber under the rear wheels will help the vehicle be more level when you have it up on jackstands helping to ensure the fluid is at the right amount.

Let me know if I can give you any more information.

Thank you,
Brendon
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Tuesday, May 30th, 2023 AT 7:43 AM

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